ABSTRACT
This Study investigated the protective effect of Gongronema latifolium supplemented diet against acute hepatotoxicity induced by crude petroleum oil on male rats. Oral exposure of rats to crude petroleum significantly decreased (P<0.05) the activities of glutathione peroxidase (GPx) and superoxide dismutase (SOD). Significant decrease in concentrations of glutathione and increase in malondialdehyde (MDA) was observed also, but catalase activity decreased nonsignificantly. Activities of these oxidative stress enzymes and concentrations of glutathione and MDA in rats exposed to crude petroleum and fed simultaneously with 20% G. latifolium supplemented diet were close to those obtained in control rats. Fluctuations in liver function parameters and serum lipid profile were observed. These results indicate that consumption of G. latifolium supplemented diet has protective effect against crude oil induced liver tissue damage.
ABSTRACT
The effect of Gongronema latifolium and Ocimum gratissimum supplemented diet on diesel petroleum induced liver damage in rats was investigated. Rats were acclimatized for two weeks and divided into three groups. Oxidative stress was induced with diesel petroleum (4 ml/kg body weight) at alternate days for seven days in group II and III rats. Group II rats were fed the supplemented diet while Group I and III fed on normal rat pellet only. After one week of feeding, the fluctuations in the activities of antioxidant enzymes - superoxide dismutase and glutathione peroxidase and concentrations of glutathione and malondialdehyde (MDA) indicated stress in the liver of the rats exposed to diesel. Significant increase (P<0.05) in serum concentration of Alanine aminotransferase (ALT) and Aspartate aminotransferase (AST) and other liver damage markers was observed in group III rats. Serum lipid profile was also studied. Feeding with the supplemented diet showed significant reduction (P<0.05) in the activities of ALT and AST and in the concentration of MDA. The activities of some antioxidant enzymes indicated nonsignificant increase (P>0.05) with treatment. The concentration of other liver marker compounds and lipid profile were positively affected by the treatment. The values obtained from treated rats showed that, while diesel can induce oxidative damage to the liver, G. latifolium and O. gratissimum in the diet, indicated protective effect against oxidative and cellular degeneration in liver tissues.
ABSTRACT
In Nigeria, petroleum contamination of the environment occurs through accidental spillage and/or sabotage of petroleum pipelines. Human exposures to petroleum products occur frequently from occupational and domestic usage. In this study male albino rats were used to evaluate the antioxidative effects of Gongronema latifolium supplemented diet on diesel petroleum induced toxicity resulting from exposure. The activities of alanine aminotransferase, aspartate aminotransferase and concentrations of total bilirubin and malondialdehyde increased (p<0.05) in the animals exposed to the petroleum product. The activities of some oxidative stress enzymes and concentrations of serum proteins decreased (p<0.05) in exposed animals. The activities of liver function enzymes and oxidative stress parameters obtained in the animals which received G. latifolium supplemented diet with diesel intoxication were comparable to the control, indicating a protective role of G. latifolium.
ABSTRACT
The aqueous extract of Combretum dolichopentalum leaves were evaluated for its protective activity against CCl4- induced liver damage. The concentration of 250 and 500 mg/kg b.w of C. dolichopentalum leaf extract were administered to different group of rats prior to CCl4 administration. Both 250 and 500 mg/kg of the extract significantly (P<0.05) reduced the activity of alanine aminotransferase, aspartate aminotransferase and alkaline phosphatase when compared to rats administered CCl4 only. Also the concentration of non-enzyme markers of hepatic dysfunction such as total bilirubin and lipid peroxidation product-malonyldialdehyde was reduced by C. dolichopentalum. But the concentration of total protein and total cholesterol was increased when compared to rats administered CCl4 only. This finding suggests that C. dolichopentalum leaves possessed rich hepatoprotective principles against CCl4 induced toxicity of the liver.
ABSTRACT
This study evaluated the effect of diesel petroleum intoxication in rats and the ability of phytochemicals and antioxidant content of Ocimum gratissimum to ameliorate such toxicity. Toxicity in rat was induced by administering 4 ml/kg body weight of diesel in the test rats except control. The intoxication and treatment with 20 % O. gratissimum supplemented diet was for 7 days. Serum liver function markers, Oxidative stress markers and lipid profile were estimated. Diesel induced hepatotoxicity was characterized by significant (p < 0.05) decrease in serum protein concentration and oxidative enzymes activities. Also increase in activities of liver function enzymes and Cholesterol was observed. The group of rats which diet was supplemented with O. gratissimum showed significant (p< 0.05) improvement in the concentration of serum proteins and decrease in the activities of liver function enzymes. Similarly the activities of oxidative enzymes significantly (p<0.05) increased, compared to the untreated rats. These results indicate a chemoprotective ability of this Nigerian indigenous spice.